A mains electricity (AC-powered) device assembly in which input energy (e.g., flashlamp, diode laser) is used to excite a glass/crystal rod to emit a high-power laser beam, in which the frequency is doubled, intended to precisely cut, excise/vaporize, and coagulate tissues for general surgery, and/or multiple specialized surgical applications (non-dedicated). It includes a light source, delivery/positioning device(s), and controls/foot-switch and may be operated in continuous-wave or pulsed modes.